Auto control system



Jan. 5, 1932. A. H.-REIBER AUTO CONTROL SYSTEM Filed Dec. 26, 1928 INVENTOR. W M m (WK-w QM ATTORNEY.

Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE ALBERT H. REIBER, F OHICAGO, ILLINOIS, ASSIGNOR TO TELETYPE CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE AUTO CONTROL SYSTEM Application filed. December 26, 1928. Serial No. 328,545.

My invention relates to a code printing telegraph system in which signals are transmitted in the form of code combinations of impulses. More particularly my invention relates to automatic telegraph printers used in such systems and has for one of its main objects the provision of means in a telegraph code system for remotely operating a signal of a special character Without designating an m individual code therefor.

In the operation of printing telegraph systems, there arise occasions when it is necessary to transmit a special signal from one of the signalling stations to the other. Inasmuch however as such occasions for transmitting the special signal occur only rarely, it is impractical to provide one of the limited available codes. for the transmission of this signal, particularly as all of these available 0 codes are needed for other signals. It therefore becomes desirable to adapt the system to some arrangement whereby the special signal may be transmitted without employing a special code.

Accordingly my invention has for one of its primary objects the provision of means for transmitting special signals over a telegraph code system without employing any one code combination of impulses.

. Another object of my invention is to provide means for transmitting a special signal over a printing telegraph system without interfering withvthe operation of the printer. A further object of my invention is to provide means for remotely operating a special signal.

Other objects of the invention are such as will be obtained by the utilization of the principles and apparatus herein disclosed and hereinafter set forth and as defined by the terms of the appended claims.

As shown in the drawings Figure l is a perspective view on a large scale of a selector mechanism to which my invention may be adapted.

Figure 2 is a front elevation of the selecting units shown in Figure 1,

Figure 3 is a circuit diagram of a preferred embodiment of my invention,

Figure 4 is a front elevation of the apparatus and selector employed in carrying out my invention, 7

Figure 5 is a side elevation of the apparatus shown in Figure 4 and Figure 6 is a diagrammatic view of the signalling device operated in accordance with my invention,

As is well known in the art the automatlc printers employed in a telegraph code system are provided with a plurality of selector mechanisms in combination with either a single line impulse responsive magnet and a rotating device for successively associating each of the selectors with the magnet or a plurality of selector magnets one individual to each of the selectors and a distributor for successively associating each of these magnets with the signalling line, the number of selectors employed depending upon the number of impulses comprising a code combinatlon. I have chosen to illustrate my invention in connection with the latter form of system although it will be understood by those skllled in the art that my invention is applicable to any printer employed in a telegraph code system. It will also be clear that although in the form chosen for illustration, a five unit code is employed, the principles of my invention are also applicable to any other code system.

In the system illustrated the five selector magnets are successively operated in accordance with the code of impulses received for the selecting of the character to be prlnted which is conditioned for printing. Thereafter a sixth pulse relay is invariably operated to complete the operation of the printing of the selected character.

Inasmuch as the sixth pulse magnet merely completes the operation conditioned by the received code, its operation may be independent of remote control and in actual practice is invariably operated at the end of a code period over a circuit locally completed and entirely independent of control from the remote point. It will be clear therefore thatv when no code is received, this magnet has no duty to perform. I therefore take advantage of this condition to provide means whereby when a blank signalling period occurs; thatis, a signalling period during which no code impulses are received the special signal will be conditioned for operation and if this is followed by a predetermined code, the conditioned signal will be operated. It will be clear from this that by the provision of such arrangement, all the available codes are employed for operating the printer inasmuch as the one code chosen foroperating the signaL ling device is effective for this purpose only if it follows a blank signal period.

In Figures 1 and 2 I have shown diagrammatically the selector mechanism of the printer disclosed in the patent to Kleinschmidtl,564,422, issued December 8, 1925. As fully described in that patent, the selector units comprise plates between which are arranged the selector magnets 2. These magnets are provided with pivoted armatures 4. Each of these armatures 4 of each magnet 2 is provided with a downwardly extended arm 5-secured thereto at 6 and adapted to be engaged in a notch 8 on a latch 9 pivoted at 10, the opposite end of which is controlled by means of an upwardly projecting pin 12 in an elongated slot 13 of a release bar 14. The latches 9 are normally forced to the position shown by individual springs 15 preparatory to latching the arms 5 when operated. Arms 5 and armatures 4 are normally held in a nonoperated position by individual springs 16. As described in the patent referred to the armatures 4 are associated with individual selector mechanisms which are operated by the movements of the armature 4 upon energization of the magnets 2.

Upon energization of the magnet 2 its armature 4 is operated to operate its individual selector and at the same time the arm 5 is moved backward against the tension of the spring 16 until it drops into the notch 8 in the latch lever 9 permitting the lever 9 to be rocked about its pivot 10 by the spring 15 and locking the arm 5 and armature 4 in its operated position. This rocking movement of latch lever 9 will also slide the sliding release bar 14 to the right through pin 12 in slot 13 for the purpose which will appear hereinafter. In this manner at the end of a code period all of the selector relays entering the code are operated and locked in accordance with the code and a unit is selected for operation as describe-d in the above cited patent.

The printing operation of the selected character is accomplished by an electromagture 22, (Figures 1 and 2) carried on a vertical arm 23 pivotally mounted on thepin 24. A spring 25 carried on a horizontal extension 26 of the vertical arm 23 normally holds the armature in its non-operated position as shown in Figure 2. A horizontal arm 27 extending oppositely from arm 26 on the vertical arm 23 engages at its outer end a latch member 28 pivotally mounted at 29 and -normally urged into engagement with the arm 27 by a spring 30 one end of which is secured to the latch 28 and the other end to the frame work in a well known manner.

The sliding release bar 14 carries at one end a dog 31 and adjacent thereto a second dog 33, the first dog being in operative relation with the downwardly extending arm 23 and the second dog 33 in operative relation with the latch 28.

Normally the horizontal arm 27 engages the notch in the latch 28 and the armature 22 is mechanically latched against operation so that energization of the magnet 21 has no efiect thereon. In response however to the energization of any one of the selecting-magnets 2, the sliding release bar 14 as described above is moved to the right. As a result of this movement of slide bar 14, the dog 33 carried by the slide bar 14 moves the latch 28 against the tension of the spring 30 and disengages it from the horizontally extending arm 27 releasing the mechanical latch of the armature 22 and conditioning this armature for operation upon theenergization of the magnet 21.

-net 21 (Figure 2) provided with an arma- As explained above following the code impulse period during which combinations of the five selector magnets are energized in accordance with the code received, the circuit for the sixth impulse is locally completed and the electro magnet 21 is energized operating armature'22. As described herein,'energizatlon of magnet 21 completes the printing operation of the selected character. As

ing the arms 5 and armatures 4 which entered the preceding combination and were in locked position. The above has been described in a general way in order to illustrate the invention, although it is more. fully described in the patent above identified.

Referring now to Figure 3, a circuit diagram for the sixth impulse magnet 21 is shown. It will be understood that this circuit is completed through a local battery and a sixth contact on the distributor (not shown) over the conductors 33 and 34. As shown a magnet 35 is connected in multiple with magnet 21 to the conductors 33 and 34 the circuit for which is controlled by the normally closed contact 36 controlled by the springs 37 and 38.

As shown in Figure 2 spring members 37 and 38 are suitably supported. on a block 41 and are insulated from each other. A switch striker. 42 carried on the bar 14 engages spring 38 as the bar 14 moves to the right. l/Vhen acode combination of impulses is received and any one of the selector magnets 2 is energized and the bar 14 is moved to the right for releasing the latched armature 22 as described above, the striker 42 will at the same time engage the spring 38 causing the contacts to disengage and opening the circuit of the electromagnet 35. lVhen therefore, a code combination of impulses is received the electromagnet 35 is rendered nonoperative and can perform no operation.

On the other hand if during a signalling period no impulses are received; that is, a blank codeperiod occurs, the slide bar 14 is not operated, the spring contacts 37 and 38 g1 remain unoperated, retaining contact 36 closed and an energizing circuit is completed for the magnets 21 and 35 in multiple during the sixth pulse period. Inasmuch however as the armature 22 of the relay 21 will now remain latched against operation since the member 14 was not moved to the right to remove the latch 28, the energization of magnet 21 has no operating effect at this time.

The energization of the magnet 35 however may now control selector mechanism in a manner now to be described for operating a. signalling device.

Referring to Figure 4, the electromagnet 35 suitably mounted on a support 45 is provided with an armature 46 carried on a pivoted upright member 47 pivoted at 48 on the ears 49 carried by the base 50. Member 47 is provided with two forked ends 51 and 52. The member 47 is held in its retracted position by a spring 53 oneend of which is secured to the member 47 and the other end to the upright member 54. Pivoted on the pin 55 on the upright 54 is a latch lever 56, one end of which 57 is forced against the horizontal extending arm 58 of the member 47 by spring 59. In the position shown however the member 47 is not latched as it is in its retracted position and lever 56 does not engage the notch on arm 58.

As described above member 47 is forked, the ends 51 and 52 being associated with in dividual pullbars 61 and 62. The pull bar 61 controls the operation of the signal device as will be described more fully hereinafter and" the pull bar 62 normally controls some printer operation as the feed, in the manner fully described in the patent to Kleins'chmidt herein mentioned. For the purpose of illustration, the line feed bar is chosen but it will be clear to those skilled in the art that any other of the bars be associated with fork 52. Both bars 61 and 62 are arranged to be operated in response to the receipt of the same code combination of impulses; in this particular case the feed code. With the member 47 in its retracted position, the forked end 51 is in the position shown beneath the pull bar 61 and in response to the line feed code, this bar is released to be operated as described in U. S. Patent No. 1,564,422, but is prevented from operating by fork 51. The bar 62 as explained above is also released by the line feed code and is operated. As a result the succeeding characters are printed on a new line. This takes place when a line feed code is received as a result of which code magnets 2 energize slidin bar 14 to the right and opening the circuit of magnet 35 so that it is not energized during the sixth pulse period.

If however a blank code period occurs, that is a signal period during which no signals are received, none of the magnets 2 are ener- 'zed. During the sixth pulse magnets 21 and 35 are energized in multiple but magnet 21 is ineffective as its armature is mechanical- 1yv latched by member 28. Magnet 35 upon energization rocks member 47 about its pivot 48 and the end 57 latches with extension 58 and member 47 is latched in its operated position.

In this position, the forked end 51 is no longer underneath the pull bar 61 and on the oth r hand the forked end 52 is positioned just beneath the pull bar 62 as shown by the dotted lines which indicates the fork memher in operated position. If now a line feed code combination of impulses follows the blank code the bars 61 and 62 are again operated. During this period member 47 is latched in its operated position and fork 52 positioned beneath bar 62 prevents it from operating.

The bar 61 on the other hand is operated and as will now be described operates a bell.

As shown in Figure 6 operating bar 61 is As described in full in the patent referred to above pull bar 61 drops into the aligned notches of the selector members when a predetermined combination is received. A striking member thereafter engages the bar 61 moving it to the right against the tension of spring 67. As the bar 61 is moved to the right it rocks the hammer 62 about its pivot 64 causing an impact between the operating end 65 and bell 66.

As explained above upon the energization the sixth pulse.

tiple circuit for the magnet 35 remains closed of magnet 35 and the movement of the member 47, the latch 56 engages the extension 58 and the member 47 is thereupon locked in its operated position. In order to restore the latched member 47 to normal, a striker 71 mounted on and rotatable with shaft 72 is provided. The shaft 72 is arranged not to rotate except when the magnet 21 is energized in a manner well known to those skilled in the art. When therefore the magnet-35 energizes in response to a blank period and magnet 21 is ineffective, shaft 72 is released for rotation and drives striker 71. The striker member 71 in its rotation engages the end 57 of the latch 56 rocking it about its pivot 55. As a result the extension 58 is disengaged from latch member 56 and member 47 is restored to its normal non-operating position by spring 53 as shown in Figure 4.

The operation of the apparatus will now be clear. In the event that the operator desires to operate the bell 66, a blank code will first be transmitted; that is a code period during which no signals are transmitted. As a result the armature 22 of the electromagnet 21 will remain mechanically locked preventing the operation of this armature eventhough the magnet 21 is energized by At the same time the muland this magnet also energizes simultaneously with the energization of the sixth pulse magnet 21. Upon energization of the magnet 35, armature 46 and member 47 are rocked about pivot 48 to the operated position at which the forked end 52 is positioned beneath the pull bar 62 and the pull bar 61 is free for operation. A second code is now transmitted which in the present illustration is the line feed code. This code operates a combination of the selector relays 2 which in turn operate notched permutation members. The alignment of the notches of these members is beneath members 61 and 62 which therefore tend to drop into them. Only one of these bars however is permitted to drop,

. in this case the bar 61,-due to the fact that the forked member 52 is now underneath the member 62. The pull bar 61 when it drops into the notches, is pulled to the right and operates the hammer end 65 against the bell 66 producing an audible signal.

Simultaneously as a result of the transmission of the code, the shaft 72 is released for rotation and latch lever 56 being in the path of rotation of. striker 71 is rocked thereby and releases the member 47 which is therefore retracted to its non-operated position by spring 53. The apparatus is thus restored to its original condition and may be operated in accordance with succeeding codes in the usual manner.

In the event of a transmission of a code the. operation of any one of the magnets 2 latched armature 22 permitting this armature to operate in response-to the energization of the electromagnet 21.

Although I have illustrated my invention in connection with a particular form of printer, it will be clear that it has many other applications and I do not intend to limit myself by thismodification but only in so far as set forth in the appending claims.

What I claim as new is:

1. In a printing telegraph apparatus, a signal device, and means responsive to a blank signal code combination for operating said signal device.

2. In a printing telegraph apparatus, a signal device, and means responsive to a blank signal code combination followed by a predetermined code combination of impulses for operating said signal device.

3. In a printing telegraph apparatus, a

signalling device, an electromagnet for controlling the operation of said signalling device, and means including circuit connections for operating said electromagnet in response to a blank signal code combination.

4. In a printing telegraph apparatus, a signalling device, an electromagnet for controlling the operation of said signalling device, means including circuit connections for operating said electromagnet in response to a blank signal code combination, and means for rendering said electromagnet non-operative in response to a code combination of impulses.

5. In a printing telegraph, selector mechanism responsive to code combinations of impulses, a sixth pulse magnet operated following the code received, a second sixth pulse magnet, said first sixth pulse magnet being normally ineffective, means for rendering said first sixth pulse magnet effective following the receipt of a code combination and 'means for rendering said second sixth pulse magnet operative, following a blank or no signal period.

6. In a printing telegraph apparatus, a first sixth pulse magnet normally non-operative, a second sixth pulse magnet normally operative, means including circuit connections responsive to a blank signal code combination for operating said second sixth ulse magnet, and a signal device controlled by the operation of said second sixth pulse magnet.

7. In a printing telegraph apparatus, a printing pulse magnet normally operative, a signal magnet normally non-operative,'means including circuit connections responsive to a blank signal code combination for rendering operative said signal magnet, a shiftable 3 selector actuated by said signal magnet and a signal operating means alternatively selectable by said shiftable selector.

8. In a printing telegraph apparatus, a printing. magnet, a signal magnet, said print ingmagnet beingnormally operative, said signal magnet being normally non-operative, means responsive to a blank code combination of impulses for rendering operative said signal magnet, and for preventing the operation of said printing magnet, a bar selectively controlled in accordance with a predetermined code combination, a signal device, and means for operating said'signal device in response to the successive operation of said signal magnet and said bar.

9. In a printing telegraph apparatus, a signalling device, a first sixth pulse magnet, a second sixth pulse magnet, and means 0 erative in the event of the transmission of a predetermined code combination following the transmission of a blank signal for operating said signalling device.

10. In a printing telegraph apparatus, a plurality of bars, means responsive to a predetermined code combination for conditioning certain of said bars for operation, and means responsive to a blank code period for permitting the operation of only one of said bars.

11. In a printing recorder, a plurality of selectable members, a plurality of selecting members, means for actuating any one of said selecting members singly and in combination With any other or others of said members to condition a plurality of said selectable members for actuation, means whereb one of said conditioned members is varial ily prevented from operation in response to a predetermined code combination of conditions, means responsive to a control signal preceding said predetermined code combination for permitting operation of one of said conditioned members and preventing operation of the remainder of said conditioned members.

12. In a printing recorder, a pair of se lectable members, electro-responsive means adapted to condition said selectable members simultaneously for operation in response to one control signal, and means responsive to an independent control signal for permitting only one of said conditioned selectable actuating members to operate.

13. In a printing recording apparatus, a plurality of selectable members, a plurality of selecting members, means responsive to a permutation code combination control signal for operating said selecting members to simultaneously condition said selectable members for operation, and means responsive to an independent permutation code combination control signal for selectively permitting 14. In a printing telegraph receiver, a pair of selectable members, a member having a fork extension positioned in operative relation with a plurality of selectable members, and so arranged that in one position it prevents movement of one of said selectable members and in the other of its positions it is in position to prevent movement of the other of said selectable members, means responsive to code combinations of signalling conditions for selecting-said members, and means responsive to a code combination signalling condition for determining the operation of said fork member whereby one or the othgr of saidselectable members are operate 15. In a printing telegraph receiver, a plurality of selectable members, a member having a plurality of positions in each of which it is in operative relation with one of said selecting members for preventing operation thereof, means responsive to code combinations of signalling conditions for selecting said selectable members simultaneously for operation, means responsive to code combinations of signalling conditions preceding said last mentioned code combination for selectively operating said member to prevent the operation of one or the other of said conditioned members, means operative following the operation of said .having a plurality of positions in each of which it is in operative relation with one of said selecting members for preventing operation thereof, means responsive to code combinations of impulse conditions for selecting a plurality of selectable members for operation, means responsive to code combinations of impulse conditions preceding said last mentioned code combination for selectively operating rid member to prevent the operation of one or the other of said conditioned members, means operative following the operation of said member for locking said member in position, periodically operating means for restoring said member to its normal position and a signalling device directly operated by said selectable member.

17. In a telegraph receiver, a plurality of selectable members; a fork member having anormal and operative position in one of which it prevents the operation of one of said selectable members and in the other of which it prevents the operation of another of said selectable members; means responsive to code combinations of impulse conditions for conditioning a plurality of said selectable members 'for operation; an electromagnet in only one of said selectable members to 0p .operative relation'with said forked member erate.

for operating it from its normal to its operatllin lZU

nae

40 v i said firstxnenti'oned selective elements and ing position, said ma et being responsive to a predetermined co e combination of signalling conditions; means operative for latching said member in operative condition: periodic means for restoring said forked member to normal condition and a signalling bell mechanically connected to said one of said selectable members for operation thereby when said selectable member is operated.

18. In a telegraph receiver, a plurality of selectable members, a fork member having a normal and operative position in one of which it prevents the operation of one of said selectable members and in the other of which it prevents the operation of another of said selectable members, means responsive to code combinations of impulse conditions for conditioning a plurality of said selectable members for operation, a printing magnet, an electro-magnet in operative relation with said first member for operating it from its normal to its operating'position, said electromagnet being in multiple circuit connection with said printing magnet, means responsive to the code combination of impulse conditions for opening the circuit of said electromagnet, means operative for latching said member in operative condition, periodic means for releasing and restoring said operating member and a signalling bell mechanically connected to one of said selectable members for operation thereby when said selectable member is operated.

19. In a signalling system having signal transmitting means and recording means, signal receiving means comprising sequentially responsive selective elements, a plurality of members individually selectable by said selective elements, and auxiliary selective means responsive to a condition of inactivity of operative to effect ashifting function.

20. In a signalling system having a transmitter adapted to send electrical signals of varying impulse intervals and a recording means, a receiver including primary selective elements sequentially responsive to certain of said impulse intervals, actuating members selectable by said selective elements in accordance with the electrical signals, and sec-' ondary selective means responsive to a conditionof inactivity of said primary elements to prepare certain of said actuating members for subsequent selection.

21. In a printing telegraph, an announcing signal mechanism; a plurality of impulse relays; a plurality of selector bars; and means to operate said signal mechanism including a-shift magnet, an armature therefor, and latching means forrsaid armature under the control of a blank signal whereby all said impulse relays are non-responsive and said shift magnet is effective. I

22. In a printing telegraph selector mechanism responsive to code impulse combine tions, means under the control of a blank signal to effect a mechanical shift of said selector mechanism, including auxiliary selector mechanism responsive only to said blank signal.

23. A telegraph selector shifting mecha nism including a shiftable blocking member, latching means for maintaining the positionment of said blocking member, and a prime mover for effecting movement of said member, means responsive to an inert condition of the selector for initiating movement of said shift mechanism, and automatic means for restoring normal condition of said mechanism.

24. In a telegraphic selector adapted to respond to signals having a fixed number of varying electrical impulses, a plurality of impulse responsive elements corresponding in number to said fixed number of electrical impulses, a plurality of members selectable by said selective elements, a shiftable secondary selector operative only in response to a blank signal, and means whereby a mechanism is actuated in accordance with said selectable members.

25. In a telegraph selector, a plurality of impulse relays, a printing magnet, a signal magnet, means whereby on the reception of a blank signal not efiecting said impulse relays said printing magnet is rendered ineffective and said signal magnet is rendered operative, and signalling mechanism operated by said signal magnet.

26. A selecting system for telegraphic communication including a telegraphic selector and conditioning means operative in response to an open line interval for changing the selective action of said selector in a subsequent cycle of operation.

27 In a telegraph receiver, a shift mechanism, signal controlled means to operate said shift mechanism to shift position, means to perform an operation in said shifted positions, and means invariably operative after a single such operation to return said shift mechanism to unshift position.

28. A telegra hically controlled shift mechanism inclu ing signal controlled means to effect a shift operation, an operating mechanism to be controlled by said shift mechanism, and means for automatically restoring said shift mechanism to normal position at the conclusion of the subsequent performance of said operating mechanism.

29. In a telegraph selector, a plurality of elements to be selected, a plurality of selecting means fewer in number than said elements, said selecting means normally disposed to afiect certain of said selectable elements, a signal operated shift mechanism for rendering certain of said normally dis osed selecting means eflective with other 0 said elements, and means for automaticall restoring normal position to all of, said e ements.

30. A telegraph signal selector having selectableelements individually adapted to perform a particular function, selecting means normally associated with certain of said ele- 6 ments, and a shift mechanism adapted to associate certain of said selecting means with certain other of said elements, said shiftin -mechanism being signal operated into shi t position and automatically returnable to nor- 10 mal position at the completion of a succeedin signal.

11 testimony whereof I aifix my signature.

A. H. REIBER. 

